The TC4-122-75X+ from Mini Circuits is a Balun with Frequency 40 MHz to 1.25 GHz, Phase Balance 0.23 to 2.88 dB, Insertion Loss 1.70 to 2.77 dB, Current 30 mA, Power 0.25 W. Tags: Surface Mount, Balanced to Balanced. More details for TC4-122-75X+ can be seen below.